Anywhere that list is documented?
I don’t think so. As far as I am aware you download a PUC table as part of the configuration process for new sources, so you may have to have a dummy run of going through the source configuration process to see what is available.
Does the PUC do anything but allow IR control from the B&O One remote?
No, but in my experience with earlier TVs/PUCs some set-top-boxes or DVD players allow a more user friendly control experience than others. It’s definitely worth asking other Forum members if they can recommend a particular DVD/BR player that they also control using BV11 and Beoremote One.